Malicious PDF — malware analysis report

Static analysis result for SHA-256 52207e02349659f4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 19:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5dbd2ea3c4318b88930bb60706efcb0 SHA-1: 23ab1ecc12712b44e9915073339563fbc17a130f SHA-256: 52207e02349659f4ba14513b890c0cf1223bdb7c479a5c7fe2259b69ddfdadf0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as free clip art, but the primary link redirects to a known malicious domain. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with SEO-based link farms used for malicious redirection. No scripts were extracted, but the document body and heuristics point to a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=baby+boy+clip+art+images+free
    • http://rasan.eaglesmusiconline.com/uploads/1/3/1/4/131453150/6081345.pdf
    • http://files.v1cafe.com/uploads/1/3/2/7/132740511/xokikog.pdf
    • http://dumawosej.kenplattlaw.net/uploads/1/3/0/9/130968984/5077531.pdf
    • http://files.acrylicdreams.com/uploads/1/3/0/8/130813668/gutilixozewamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/woliperuzege.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/85440771616.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/14939322138.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/junevafipakusideluxenido.pdf
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/conversion_de_cm_a_pulgadas.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/cambridge_phrasal_verbs_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/basamafixebudolu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/horizontal_rule_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/2011/5358/files/83253816034.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/bixeluxin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0449/files/razusikovadalizura.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/42946529481.pdf
    • https://cdn.shopify.com/s/files/1/0436/4707/4464/files/thermodynamics_cengel_7th.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006655.bin
5efbec888b449f4469bfb18faa221b66f1abcd277ca3e219a3e208e2f3914cb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6655 5624 bytes
font_01_sfnt_off00007964.bin
5a9314d35241e2f44a891bdb2437428fa9b3e2c5d87db4255aa422e6a37a3715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7964 10060 bytes

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